package BasicMethod;
public class FinalizationDemo {  
    public static void main(String[] args) {  
      Cake c1 = new Cake(1);  
      Cake c2 = new Cake(2);  
      Cake c3 = new Cake(3);  
        
      c2 = c3 = null;  
      System.gc(); //调用Java垃圾收集器
    }  
  }  
   
  class Cake extends Object {  
    private int id;  
    public Cake(int id) {  
      this.id = id;  
      System.out.println("Cake Object " + id + " is created");  
    }  
      
    protected void finalize() throws java.lang.Throwable {  
      super.finalize();  
      System.out.println("Cake Object " + id + " is disposed");  
    }  
  }